Multi-robot collaboration needs proximity that knows the task by adapting to interaction intent, not just geometric distance. Awareness of Uncertainty in Robot Actions (AURA) defines a continuous, actor-based proximity field from perception and internal state estimation to model spatial influence and anticipate intrusion. AURA Sharing, a mode-aware extension in which multiple robots reinterpret their outer AURA fields according to the collaboration mode: coexistence, cooperation or collaboration. The inner hard core remains private while the outer field becomes the interface for task-dependent spatial coordination.